I am considering to buy the Infiniti FX35 or FX50, just want to see any pros and cons. Also the FX50 comes with 21" wheel, is there any benefit to have bigger wheel? Will it run faster, help turning or save gas?

The larger wheel is mainly a cosmetic choice. Although, it does require a lower profile tire and in turn this will give a stiffer ride. Overall they are both very depenable vehicles.

Depending on the year, reliability ratings on the FX35 are very good, even comparable to the Lexus RX vehicles. I bought an '03 because of the ratings and I'm very happy with the choice!